Steam-blower



H. E. PARSON.

STEAM BLOWER.

(No Model.)

Patented Dec. 22,1896

UNITED STATES PATENT OFFICE.

HENRY E. PARSON, OF BROQKLYN, NEW YORK.

STEAM-BLOWER.

SPECIFICATION forming part of Letters Patent No. 573,480, dated December 22, 1896.

Application filed March 3, 1896. Serial No. 581,691. (No model.)

' citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Steam-Blowers, of which the following is a specification.

This invention has reference to an improved steam-blower for providing a forced draft for the furnaces of steam-boilers, especially when burning breeze, small coke, small sizes of anthracite coal, and coal or coke dust, so as to prevent the formation of clinkers on the grate; and the invention consists of a steam-blower composed of an exterior casing, and a starshaped nozzle-frame provided with a number of nozzles through which the steam is discharged in jets, said steam being superheated onits way to the blower and mixed with a sufficient quantity of atmospheric air drawn in by the steam-jets through the casing of the blower,so that a mixture of superheated steam and air is supplied to the fuel 011 the gratebars, as will be fully described hereinafter and finally pointed out in the claims.

In the accompanying drawings, Figure 1 represents a perspective View of a steamboiler with my improved steam-blower and superheater, part of the side wall of the boiler-furnace being broken away to show the interior arrangement of the superheater. Fig. 2 is a vertical transverse section on line 2 2, Fig. 1, drawn on a larger scale. Fig. 3 is a detail front view of the blower; and Fig. 4 is a vertical longitudinal section'of the same on line 4 l, Fig. 3; and Fig. 5 is a detail vertical transverse section through the superheater on line 5 5, Fig. 2.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents the casing of my improved steam-blower, which is located at the lower part of the front or side wall of the furnace. The casing A passes through the-wall of the furnace into the ash-pit of the furnace. In the casing A is arranged a star-shaped nozzle-frame B, which is provided with a number of tapering steam-nozzles b, that extend at right angles from the ends of radial arms I) of the nozzle-frame B, so as to form angular spaces between the arms through which the air can be drawn toward the inside of the casing by the steam-jets escaping from the nozzles.

The nozzle-frame B is connected with a steam-supply pipe 0, which is again. connected with a suitable superheater D, that is arranged in a brick-incased chamber D, ar-

, ranged along the side wall of the furnace and the grate E, as shown clearly in Figs. 1 and 5. The steam is supplied to the superheater D by a pipe D from the steam-dome of the boiler and superheated by the heated bricks which form the chamberD, so that the steam is supplied in dry and superheated condition to the nozzles of the blower. The escaping steam draws in the atmospheric air in a num' ber of parallel columns corresponding to the angular spaces between the radial arms I) of the nozzle-frame B, so that the airand steam intermingle with each other in the ash-pit, the door of which is tightly closed, and are supplied under pressure through openings in the grate-bars to the fuel. The supply of steam to the nozzles of the blowers is controlled by a valve cl, which is located in the steam-supply pipe 0 above the blower. By regulating the supply of steam by the valve cl any desired pressure of the blast can be obtained according to the size of the boilerfurnace. burned, it is necessary to moisten the fuel before burning it in connection with the blower. When the superheated steam is brought into contact with the body of incandescent fuel on the grate-bars, it is disassociated, and thereby perfect combustion of the fuel obtained without any formation of clinkers in the openings of the grate-bars.

The nozzle-frame and nozzles of the blower are made in one casting by properly coring the nozzles 19 and arms I), while the casing is Then small coke or breeze is to be.

cast separately, bot-h forming together 'a a for connecting the superheater with the nozzle-frame, and a steam-pipe connecting the snperheater with the boiler, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed my name in presence of two subscribing Witnesses.

HENRY E. PARSON.

\Vitnesses:

PAUL GoEPEL, GEO. W. JAEKEL. 

